Question 1

A 4.5-V battery is connected to two resistors connected in series as shown in the drawing.Determine the total power dissipated in the resistors.

Accepted Answer

A) 0.033 W 
B) 0.090 W 
C) 0.15 W 
D) 0.60 W 
E) 4.7 W 
A) 0.033 W 
B) 0.090 W 
C) 0.15 W 
D) 0.60 W 
E) 4.7 W C

Question 2

Three resistors are connected as shown in the figure.The potential difference between points A and B is 26 V.
  
-What is the equivalent resistance between the points A and B?

Accepted Answer

A) 3.8   
B) 4.3   
C) 5.1   
D) 6.8   
E) 9.0   
A) 3.8   
B) 4.3   
C) 5.1   
D) 6.8   
E) 9.0   B

Question 3

Four resistors and a 6-V battery are arranged as shown in the circuit diagram.
  
-The smallest current passes through which resistor(s)?

Accepted Answer

A) the 10-  resistor 
B) the 20-  resistor 
C) the 30-  resistor 
D) the 60-  resistor 
E) It is the same and the smallest in the 30-  and 60- resistors. 
A) the 10-  resistor 
B) the 20-  resistor 
C) the 30-  resistor 
D) the 60-  resistor 
E) It is the same and the smallest in the 30-  and 60- resistors. D

Question 4

Five resistors are connected as shown in the diagram.The potential difference between points A and B is 25 V.
  
-What is the potential drop across the 3.5-  resistor?

Accepted Answer

A) 2.0 V 
B) 5.0 V 
C) 8.0 V 
D) 17 V 
E) 25 V 
A) 2.0 V 
B) 5.0 V 
C) 8.0 V 
D) 17 V 
E) 25 V

Question 5

The characteristics of five wires are given in the table.
  The gauge is a measure of the diameter of the wire;and #18 corresponds to a diameter of 1.2 × 10S1U1P1-S1S1P0³ m;and #22 corresponds to a diameter of 6.4 × 10S1U1P1-S1S1P0⁴ m.The resistivity of iron is 9.7 × 10S1U1P1-S1S1P0⁸  × m;and the value for copper is 1.72 × 10S1U1P1-S1S1P0⁸   × m.
-Of the five wires,which one has the smallest resistance?

Accepted Answer

A) wire A 
B) wire B 
C) wire C 
D) wire D 
E) wire E 
A) wire A 
B) wire B 
C) wire C 
D) wire D 
E) wire E

Question 6

The current through a certain heater wire is found to be fairly independent of its temperature.If the current through the heater wire is doubled,the amount of energy delivered by the heater in a given time interval will

Accepted Answer

A) increase by a factor of two. 
B) decrease by a factor of two. 
C) increase by a factor of four. 
D) decrease by a factor of four. 
E) increase by a factor of eight. 
A) increase by a factor of two. 
B) decrease by a factor of two. 
C) increase by a factor of four. 
D) decrease by a factor of four. 
E) increase by a factor of eight.

Question 7

Three resistors are placed in a circuit as shown.The potential difference between points A and B is 30 V.
  
-What is the potential drop across the 30-  resistor?

Accepted Answer

A) 10 V 
B) 20 V 
C) 30 V 
D) 60 V 
E) 100 V 
A) 10 V 
B) 20 V 
C) 30 V 
D) 60 V 
E) 100 V

Question 8

The potential difference across the ends of a wire is doubled in magnitude.If Ohm's law is obeyed,which one of the following statements concerning the resistance of the wire is true?

Accepted Answer

A) The resistance is one half of its original value. 
B) The resistance is twice its original value. 
C) The resistance is not changed. 
D) The resistance increases by a factor of four. 
E) The resistance decreases by a factor of four. 
A) The resistance is one half of its original value. 
B) The resistance is twice its original value. 
C) The resistance is not changed. 
D) The resistance increases by a factor of four. 
E) The resistance decreases by a factor of four.

Question 9

Four resistors and a 6-V battery are arranged as shown in the circuit diagram.
  
-The largest potential difference is across which resistor(s)?

Accepted Answer

A) the 10-  resistor 
B) the 20-  resistor 
C) the 30-  resistor 
D) the 60-  resistor 
E) It is the same and the largest for the 30-  and 60-  resistors. 
A) the 10-  resistor 
B) the 20-  resistor 
C) the 30-  resistor 
D) the 60-  resistor 
E) It is the same and the largest for the 30-  and 60-  resistors.

Question 10

Three parallel plate capacitors,each having a capacitance of 1.0 µF are connected in parallel. The potential difference across the combination is 100 V.What is the equivalent capacitance of this combination?

Accepted Answer

A) 0.3   
B) 1   
C) 3   
D) 6   
E)   
A) 0.3   
B) 1   
C) 3   
D) 6   
E)

Question 11

Five resistors are connected as shown in the diagram.The potential difference between points A and B is 25 V.
  
-What is the current through the 1.8-  resistor?

Accepted Answer

A) 2.8 A 
B) 3.3 A 
C) 5.6 A 
D) 6.9 A 
E) 14 A 
A) 2.8 A 
B) 3.3 A 
C) 5.6 A 
D) 6.9 A 
E) 14 A

Question 12

A simple RC circuit consists of a 1- capacitor in series with a 2800-  resistor,a 6-V battery,and an open switch.Initially,the capacitor is uncharged.How long after the switch is closed will the voltage across the capacitor be 4.1 V?

Accepted Answer

A) 3 × 10-⁴ s 
B) 3 s 
C) 3 × 10-⁸ s 
D) 3 × 10-⁶ s 
E) 3 × 10-³ s 
A) 3 × 10-⁴ s 
B) 3 s 
C) 3 × 10-⁸ s 
D) 3 × 10-⁶ s 
E) 3 × 10-³ s

Question 13

Which one of the following situations results in a conventional electric current that flows northward?

Accepted Answer

A) a beam of protons moves eastward 
B) an electric dipole moves southward 
C) a beam of electrons moves southward 
D) a beam of electrons moves northward 
E) a beam of protons moves northward 
A) a beam of protons moves eastward 
B) an electric dipole moves southward 
C) a beam of electrons moves southward 
D) a beam of electrons moves northward 
E) a beam of protons moves northward

Question 14

Two resistors are arranged in a circuit that carries a total current of 15 A as shown in the figure.Which one of the entries in the following table is correct?

Accepted Answer

The answer of Two resistors are arranged in a circuit...

Question 15

The figure shows variation of the current through the heating element with time in an iron when it is plugged into a standard 120 V,60 Hz outlet.
  
-If t₁ = 0.050 s,what is the value of t₂? Note: The origin for the graph is not necessarily at t = 0 s.

Accepted Answer

A) 0.067 s 
B) 0.079 s 
C) 0.10 s 
D) 0.60 s 
E) 61 s 
A) 0.067 s 
B) 0.079 s 
C) 0.10 s 
D) 0.60 s 
E) 61 s

Question 16

Two wires A and B are made of the same material and have the same diameter.Wire A is twice as long as wire B.If each wire has the same potential difference across its ends,which one of the following statements is true concerning the current in wire A?

Accepted Answer

A) The current is one-fourth that in B. 
B) The current is four times that in B. 
C) The current is equal to the current in B. 
D) The current is half as much as that in B. 
E) It is twice as much as that in B. 
A) The current is one-fourth that in B. 
B) The current is four times that in B. 
C) The current is equal to the current in B. 
D) The current is half as much as that in B. 
E) It is twice as much as that in B.

Question 17

The figure shows a simple RC circuit consisting of a 10.0-µF capacitor in series with a resistor.Initially,the switch is open as suggested in the figure.The capacitor has been charged so that the potential difference between its plates is 100.0 V.At t = 0 s,the switch is closed.The capacitor discharges exponentially so that 2.0 s after the switch is closed,the potential difference between the capacitor plates is 37 V.In other words,in 2.0 s the potential difference between the capacitor plates is reduced to 37 % of its original value.
  
-Calculate the electric potential energy stored in the capacitor before the switch is closed.

Accepted Answer

A) 0.01 J 
B) 0.02 J 
C) 0.03 J 
D) 0.04 J 
E) 0.05 J 
A) 0.01 J 
B) 0.02 J 
C) 0.03 J 
D) 0.04 J 
E) 0.05 J

Question 18

A 3.0-µF capacitor is connected in series with a 4.0-µF capacitor and a 48-V battery.What quantity of charge is supplied by the battery to charge the capacitors?

Accepted Answer

A) 3.4 × 10-⁴ C 
B) 7.3 × 10-⁴ C 
C) 3.0 × 10-⁵ C 
D) 8.2 × 10-⁵ C 
E) 1.8 × 10-⁶ C 
A) 3.4 × 10-⁴ C 
B) 7.3 × 10-⁴ C 
C) 3.0 × 10-⁵ C 
D) 8.2 × 10-⁵ C 
E) 1.8 × 10-⁶ C

Question 19

Jason's circuit has a 24- resistor that is connected in series to two 12-  resistors that are connected in parallel.JoAnna's circuit has three identical resistors wired in parallel.If the equivalent resistance of Jason's circuit is the same as that of JoAnna's circuit,determine the value of JoAnna's resistors.

Accepted Answer

A) 90   
B)   
C) 30   
D)   
E) 12   
A) 90   
B)   
C) 30   
D)   
E) 12

Question 20

The figure shows a circuit.The switch S can be closed on either point A or C,but not both at the same time.Use the following quantities:
V₁ = V₂ = 12 V
R₁ = R₄ = 1.0 W
R₂ = R₃ = 2.0 W
  
-What is the equivalent resistance between the points A and B?

Accepted Answer

A) 1   
B) 2   
C) 3   
D) 4   
E) 5   
A) 1   
B) 2   
C) 3   
D) 4   
E) 5

A 4.5-V battery is connected to two resistors connected in series as shown in the drawing.Determine the total power dissipated in the resistors.

Three resistors are connected as shown in the figure.The potential difference between points A and B is 26 V. -What is the equivalent resistance between the points A and B?

Four resistors and a 6-V battery are arranged as shown in the circuit diagram. -The smallest current passes through which resistor(s)?

Five resistors are connected as shown in the diagram.The potential difference between points A and B is 25 V. -What is the potential drop across the 3.5- resistor?

The current through a certain heater wire is found to be fairly independent of its temperature.If the current through the heater wire is doubled,the amount of energy delivered by the heater in a given time interval will

Three resistors are placed in a circuit as shown.The potential difference between points A and B is 30 V. -What is the potential drop across the 30- resistor?

The potential difference across the ends of a wire is doubled in magnitude.If Ohm's law is obeyed,which one of the following statements concerning the resistance of the wire is true?

Four resistors and a 6-V battery are arranged as shown in the circuit diagram. -The largest potential difference is across which resistor(s)?

Three parallel plate capacitors,each having a capacitance of 1.0 µF are connected in parallel. The potential difference across the combination is 100 V.What is the equivalent capacitance of this combination?

Five resistors are connected as shown in the diagram.The potential difference between points A and B is 25 V. -What is the current through the 1.8- resistor?

A simple RC circuit consists of a 1-capacitor in series with a 2800- resistor,a 6-V battery,and an open switch.Initially,the capacitor is uncharged.How long after the switch is closed will the voltage across the capacitor be 4.1 V?

Which one of the following situations results in a conventional electric current that flows northward?

Two resistors are arranged in a circuit that carries a total current of 15 A as shown in the figure.Which one of the entries in the following table is correct?

The figure shows variation of the current through the heating element with time in an iron when it is plugged into a standard 120 V,60 Hz outlet. -If t₁ = 0.050 s,what is the value of t₂? Note: The origin for the graph is not necessarily at t = 0 s.

Two wires A and B are made of the same material and have the same diameter.Wire A is twice as long as wire B.If each wire has the same potential difference across its ends,which one of the following statements is true concerning the current in wire A?

A 3.0-µF capacitor is connected in series with a 4.0-µF capacitor and a 48-V battery.What quantity of charge is supplied by the battery to charge the capacitors?

The figure shows a circuit.The switch S can be closed on either point A or C,but not both at the same time.Use the following quantities: V₁ = V₂ = 12 V R₁ = R₄ = 1.0 W R₂ = R₃ = 2.0 W -What is the equivalent resistance between the points A and B?

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Exam 20: Electric Circuits

A 4.5-V battery is connected to two resistors connected in series as shown in the drawing.Determine the total power dissipated in the resistors.

Three resistors are connected as shown in the figure.The potential difference between points A and B is 26 V. -What is the equivalent resistance between the points A and B?

Four resistors and a 6-V battery are arranged as shown in the circuit diagram. -The smallest current passes through which resistor(s)?

Five resistors are connected as shown in the diagram.The potential difference between points A and B is 25 V. -What is the potential drop across the 3.5- resistor?

The current through a certain heater wire is found to be fairly independent of its temperature.If the current through the heater wire is doubled,the amount of energy delivered by the heater in a given time interval will

Three resistors are placed in a circuit as shown.The potential difference between points A and B is 30 V. -What is the potential drop across the 30- resistor?

The potential difference across the ends of a wire is doubled in magnitude.If Ohm's law is obeyed,which one of the following statements concerning the resistance of the wire is true?

Four resistors and a 6-V battery are arranged as shown in the circuit diagram. -The largest potential difference is across which resistor(s)?

Three parallel plate capacitors,each having a capacitance of 1.0 µF are connected in parallel. The potential difference across the combination is 100 V.What is the equivalent capacitance of this combination?

Five resistors are connected as shown in the diagram.The potential difference between points A and B is 25 V. -What is the current through the 1.8- resistor?

A simple RC circuit consists of a 1-capacitor in series with a 2800- resistor,a 6-V battery,and an open switch.Initially,the capacitor is uncharged.How long after the switch is closed will the voltage across the capacitor be 4.1 V?

Which one of the following situations results in a conventional electric current that flows northward?

Two resistors are arranged in a circuit that carries a total current of 15 A as shown in the figure.Which one of the entries in the following table is correct?

The figure shows variation of the current through the heating element with time in an iron when it is plugged into a standard 120 V,60 Hz outlet. -If t₁ = 0.050 s,what is the value of t₂? Note: The origin for the graph is not necessarily at t = 0 s.

Two wires A and B are made of the same material and have the same diameter.Wire A is twice as long as wire B.If each wire has the same potential difference across its ends,which one of the following statements is true concerning the current in wire A?

A 3.0-µF capacitor is connected in series with a 4.0-µF capacitor and a 48-V battery.What quantity of charge is supplied by the battery to charge the capacitors?

The figure shows a circuit.The switch S can be closed on either point A or C,but not both at the same time.Use the following quantities: V₁ = V₂ = 12 V R₁ = R₄ = 1.0 W R₂ = R₃ = 2.0 W -What is the equivalent resistance between the points A and B?

Fluids

The Transfer of Heat

The Ideal Gas Law and Kinetic Theory

Thermodynamics

The Principle of Linear Superposition and Interference Phenomena

Electromagnetic Induction

The Refl Ection of Light: Mirrors

The Refraction of Light: Lenses and Optical Instruments

Particles and Waves

Filters